Fabrication of enriched 174Yb2O3 thin targets on carbon and tantalum backings

Making multiple thin targets by the evaporation method, without breaking the vacuum of the chamber minimizes the time and the amount of the enriched target material. In the present work the making of two thin isotopic 174Yb2O3 targets: one of thickness ~763 μg/cm2 on a tantalum backing foil (thickness ~3.25 mg/cm2) and the other of ~125 μg/cm2 on carbon backing foil (thickness ~25 μg/cm2) are reported. The targets were made by the evaporation method using a cryogenic pump based Ultra High Vacuum (UHV) chamber available at the Inter University accelerator center (IUAC), Delhi. In this activity only 49 mg of 99.9% enriched 174Yb2O3 target material has been used.